/* ===== Theme tokens ===== */
:root {
  --bg: #f4f5fb;
  --bg-grad-1: #e9ecfb;
  --bg-grad-2: #f7f0fb;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --border: rgba(20, 22, 40, 0.10);
  --text: #161726;
  --text-soft: #5a5d72;
  --text-faint: #8b8ea3;
  --accent: #6c5ce7;
  --accent-2: #00b8d4;
  --accent-3: #ff5e9c;
  --good: #18b368;
  --shadow: 0 18px 50px -20px rgba(40, 30, 90, 0.35);
  --orb-1: #8b7bff;
  --orb-2: #5ce1e6;
  --orb-3: #ff8fcf;
}
[data-theme="dark"] {
  --bg: #0b0c14;
  --bg-grad-1: #12101f;
  --bg-grad-2: #0c1620;
  --surface: rgba(24, 26, 40, 0.62);
  --surface-solid: #181a28;
  --border: rgba(255, 255, 255, 0.09);
  --text: #ecedf6;
  --text-soft: #a6a9bf;
  --text-faint: #6f7287;
  --accent: #8b7bff;
  --accent-2: #2ad4e6;
  --accent-3: #ff6fae;
  --good: #2ee08e;
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.8);
  --orb-1: #6c5ce7;
  --orb-2: #00b8d4;
  --orb-3: #ff5e9c;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 80% -10%, var(--bg-grad-1), transparent 60%),
    radial-gradient(1000px 500px at 0% 10%, var(--bg-grad-2), transparent 55%);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color .5s ease, color .4s ease;
  -webkit-font-smoothing: antialiased;
}

/* ===== Animated background orbs ===== */
.bg-orbs { position: fixed; inset: 0; z-index: -1; overflow: hidden; filter: blur(60px); opacity: .55; }
.orb { position: absolute; border-radius: 50%; mix-blend-mode: screen; }
.orb-1 { width: 460px; height: 460px; background: var(--orb-1); top: -120px; left: -80px; animation: float1 18s ease-in-out infinite; }
.orb-2 { width: 380px; height: 380px; background: var(--orb-2); bottom: -100px; right: -60px; animation: float2 22s ease-in-out infinite; }
.orb-3 { width: 300px; height: 300px; background: var(--orb-3); top: 40%; right: 30%; animation: float3 26s ease-in-out infinite; }
@keyframes float1 { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(120px,80px) scale(1.15);} }
@keyframes float2 { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(-100px,-60px) scale(1.1);} }
@keyframes float3 { 0%,100%{transform:translate(0,0) scale(1);} 50%{transform:translate(60px,-90px) scale(1.2);} }
@media (prefers-reduced-motion: reduce) { .orb { animation: none !important; } * { animation-duration: .001s !important; } }

/* ===== Topbar ===== */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px clamp(16px, 4vw, 48px);
  max-width: 1080px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center;
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px -8px var(--accent);
  animation: pop .6s cubic-bezier(.2,.9,.3,1.3) both;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; }
.brand-sub { font-size: .68rem; color: var(--text-faint); letter-spacing: .02em; }

.theme-toggle {
  width: 44px; height: 44px; border-radius: 13px; border: 1px solid var(--border);
  background: var(--surface); backdrop-filter: blur(12px); color: var(--text);
  cursor: pointer; display: grid; place-items: center; position: relative;
  transition: transform .25s, border-color .25s, background .3s;
}
.theme-toggle:hover { transform: translateY(-2px) rotate(8deg); border-color: var(--accent); }
.theme-toggle:active { transform: scale(.92); }
.theme-toggle svg { position: absolute; transition: transform .5s cubic-bezier(.5,0,.2,1), opacity .35s; }
[data-theme="dark"] .ico-sun { transform: rotate(-90deg) scale(0); opacity: 0; }
[data-theme="dark"] .ico-moon { transform: rotate(0) scale(1); opacity: 1; }
[data-theme="light"] .ico-sun { transform: rotate(0) scale(1); opacity: 1; }
[data-theme="light"] .ico-moon { transform: rotate(90deg) scale(0); opacity: 0; }

/* ===== Layout ===== */
.container { max-width: 1080px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px) 60px; }

.hero { text-align: center; padding: 28px 0 36px; }
.hero-title { font-size: clamp(2rem, 5.5vw, 3.4rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.05; animation: rise .7s cubic-bezier(.2,.8,.2,1) both; }
.grad { background: linear-gradient(100deg, var(--accent), var(--accent-3), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; background-size: 200% auto; animation: shine 6s linear infinite; }
@keyframes shine { to { background-position: 200% center; } }
.hero-sub { margin-top: 16px; color: var(--text-soft); font-size: clamp(.95rem,2.5vw,1.1rem); max-width: 560px; margin-inline: auto; animation: rise .7s .1s cubic-bezier(.2,.8,.2,1) both; }

/* ===== Dropzone ===== */
.dropzone {
  position: relative; border-radius: 24px; padding: clamp(36px, 7vw, 64px);
  background: var(--surface); backdrop-filter: blur(16px);
  border: 2px dashed var(--border); text-align: center; cursor: pointer;
  transition: border-color .3s, transform .3s, box-shadow .3s, background .3s;
  animation: rise .7s .2s cubic-bezier(.2,.8,.2,1) both;
}
.dropzone::before {
  content: ''; position: absolute; inset: -2px; border-radius: 24px; padding: 2px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2), var(--accent-3));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .35s;
}
.dropzone:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.dropzone.dragging { border-color: transparent; transform: scale(1.015); }
.dropzone.dragging::before { opacity: 1; }
.dz-icon { width: 84px; height: 84px; margin: 0 auto 18px; border-radius: 22px; display: grid; place-items: center; color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); transition: transform .35s; }
.dropzone:hover .dz-icon { transform: translateY(-4px); }
.dropzone.dragging .dz-icon { animation: bob .9s ease-in-out infinite; }
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.dz-title { font-size: 1.3rem; font-weight: 700; }
.dz-or { color: var(--text-soft); margin-top: 8px; font-size: .95rem; }
.dz-hint { color: var(--text-faint); margin-top: 14px; font-size: .8rem; letter-spacing: .02em; }
.link-btn { background: none; border: none; color: var(--accent); font: inherit; font-weight: 600; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
kbd { background: var(--surface-solid); border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; font-size: .72rem; font-family: 'JetBrains Mono', monospace; }

/* ===== Panel ===== */
.panel, .results { margin-top: 26px; padding: clamp(20px, 4vw, 32px); border-radius: 22px; background: var(--surface); backdrop-filter: blur(16px); border: 1px solid var(--border); box-shadow: var(--shadow); }
.panel-head, .results-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 12px; flex-wrap: wrap; }
.panel-head h2, .results-head h2 { font-size: 1.25rem; font-weight: 700; letter-spacing: -.02em; }
.badge { font-size: .78rem; font-weight: 600; color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); padding: 5px 12px; border-radius: 999px; }

/* tabs */
.mode-tabs { display: flex; gap: 6px; padding: 5px; background: color-mix(in srgb, var(--text) 5%, transparent); border-radius: 14px; flex-wrap: wrap; }
.tab { flex: 1 1 auto; min-width: max-content; border: none; background: none; color: var(--text-soft); font: inherit; font-weight: 600; font-size: .88rem; padding: 9px 14px; border-radius: 10px; cursor: pointer; transition: color .25s, background .25s, transform .15s; }
.tab:hover { color: var(--text); }
.tab.active { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 6px 16px -8px var(--accent); }
.tab:active { transform: scale(.96); }

.mode-panel { padding: 22px 4px 8px; animation: fade .35s ease both; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } }

.field-label { display: block; font-size: .85rem; font-weight: 600; color: var(--text-soft); margin-bottom: 9px; }
.field-label strong { color: var(--accent); }
.field { flex: 1; }

/* range */
.range { -webkit-appearance: none; appearance: none; width: 100%; height: 7px; border-radius: 999px; background: color-mix(in srgb, var(--text) 12%, transparent); cursor: pointer; outline: none; }
.range::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); box-shadow: 0 4px 12px -2px var(--accent); cursor: grab; transition: transform .15s; }
.range::-webkit-slider-thumb:active { cursor: grabbing; transform: scale(1.2); }
.range::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); cursor: grab; }

.quick-chips { display: flex; gap: 8px; margin-top: 16px; }
.chip { border: 1px solid var(--border); background: var(--surface-solid); color: var(--text-soft); font: inherit; font-weight: 600; font-size: .82rem; padding: 7px 16px; border-radius: 999px; cursor: pointer; transition: all .2s; }
.chip:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* inputs */
.dim-row { display: flex; align-items: flex-end; gap: 12px; }
.text-input { width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface-solid); color: var(--text); font: inherit; font-size: .95rem; transition: border-color .2s, box-shadow .2s; }
.text-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }
.select { cursor: pointer; }
.lock-btn { flex: 0 0 auto; width: 46px; height: 46px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface-solid); color: var(--text-soft); cursor: pointer; display: grid; place-items: center; transition: all .2s; }
.lock-btn.active { color: var(--accent); border-color: var(--accent); }
.lock-btn .ico-unlock { display: none; }
.lock-btn:not(.active) .ico-lock { display: none; }
.lock-btn:not(.active) .ico-unlock { display: block; }

.micro-hint { font-size: .78rem; color: var(--text-faint); margin-top: 12px; }

/* presets */
.preset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.preset-card { display: flex; flex-direction: column; gap: 3px; align-items: flex-start; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--border); background: var(--surface-solid); color: var(--text); font: inherit; font-weight: 700; cursor: pointer; transition: all .22s; }
.preset-card small { font-weight: 500; color: var(--text-faint); font-family: 'JetBrains Mono', monospace; font-size: .72rem; }
.preset-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 12px 24px -14px var(--accent); }
.preset-card.active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--surface-solid)); }

.div { border: none; border-top: 1px solid var(--border); margin: 22px 0; }

.opts-row { display: flex; gap: 20px; flex-wrap: wrap; }
.opts-row .field { min-width: 200px; }

/* actions */
.actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 9px; border: none; cursor: pointer;
  font: inherit; font-weight: 700; font-size: .98rem; color: #fff; padding: 14px 26px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  background-size: 180% auto; box-shadow: 0 12px 28px -12px var(--accent);
  transition: transform .2s, box-shadow .25s, background-position .4s;
}
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); background-position: right center; box-shadow: 0 18px 34px -14px var(--accent); }
.btn-primary:active:not(:disabled) { transform: translateY(0) scale(.98); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary.small { padding: 10px 18px; font-size: .88rem; border-radius: 12px; }
.btn-ghost { border: 1px solid var(--border); background: transparent; color: var(--text-soft); font: inherit; font-weight: 600; padding: 14px 22px; border-radius: 14px; cursor: pointer; transition: all .2s; }
.btn-ghost:hover { color: var(--accent-3); border-color: var(--accent-3); }

/* ===== Results ===== */
.saved-pill { font-size: .8rem; font-weight: 600; color: var(--good); background: color-mix(in srgb, var(--good) 16%, transparent); padding: 4px 11px; border-radius: 999px; margin-left: 6px; }
.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }

.file-card { position: relative; border-radius: 18px; border: 1px solid var(--border); background: var(--surface-solid); overflow: hidden; animation: rise .5s cubic-bezier(.2,.8,.2,1) both; }
.file-thumb { position: relative; aspect-ratio: 16/10; background: repeating-conic-gradient(color-mix(in srgb,var(--text) 6%,transparent) 0% 25%, transparent 0% 50%) 50% / 20px 20px; display: grid; place-items: center; overflow: hidden; }
.file-thumb img { width: 100%; height: 100%; object-fit: cover; }
.pdf-preview { width: 100%; height: 100%; display: grid; place-items: center; gap: 8px; color: var(--text-soft); background: linear-gradient(145deg, color-mix(in srgb, var(--accent-3) 12%, var(--surface-solid)), color-mix(in srgb, var(--accent-2) 10%, var(--surface-solid))); font-size: .78rem; font-weight: 700; text-align: center; }
.pdf-doc { width: 54px; height: 68px; border-radius: 8px; display: grid; place-items: center; color: #fff; background: var(--accent-3); box-shadow: 0 12px 24px -14px var(--accent-3); font-family: 'JetBrains Mono', monospace; font-size: .82rem; position: relative; }
.pdf-doc::after { content: ''; position: absolute; top: 0; right: 0; border-top: 14px solid color-mix(in srgb, #fff 55%, var(--accent-3)); border-left: 14px solid transparent; border-top-right-radius: 8px; }
.thumb-spinner { width: 34px; height: 34px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.file-body { padding: 14px 16px; }
.file-name { font-weight: 600; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: .8rem; font-family: 'JetBrains Mono', monospace; }
.size-old { color: var(--text-faint); text-decoration: line-through; }
.size-arrow { color: var(--text-faint); }
.size-new { color: var(--text); font-weight: 600; }
.dims { font-size: .72rem; color: var(--text-faint); margin-top: 5px; font-family: 'JetBrains Mono', monospace; }

.save-tag { position: absolute; top: 10px; left: 10px; font-size: .72rem; font-weight: 700; color: #fff; background: var(--good); padding: 3px 9px; border-radius: 999px; box-shadow: 0 4px 12px -4px var(--good); }
.save-tag.up { background: var(--accent-3); }

.card-actions { display: flex; gap: 8px; margin-top: 12px; }
.dl-btn { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: none; cursor: pointer; font: inherit; font-weight: 600; font-size: .82rem; color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); padding: 9px; border-radius: 10px; transition: all .2s; }
.dl-btn:hover { background: var(--accent); color: #fff; }
.rm-btn { width: 38px; flex: 0 0 auto; border: 1px solid var(--border); background: transparent; color: var(--text-faint); border-radius: 10px; cursor: pointer; display: grid; place-items: center; transition: all .2s; }
.rm-btn:hover { color: var(--accent-3); border-color: var(--accent-3); }
.rm-btn.full { width: auto; flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 6px; font: inherit; font-weight: 600; font-size: .82rem; padding: 9px; }

.progress-bar { position: absolute; bottom: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); width: 0; transition: width .3s; }

/* ===== Preview card: tools, selection ===== */
.file-card.selectable .file-thumb { cursor: pointer; }
.thumb-tools { position: absolute; top: 8px; right: 8px; display: flex; gap: 6px; opacity: 0; transform: translateY(-4px); transition: opacity .2s, transform .2s; }
.file-card:hover .thumb-tools, .file-card:focus-within .thumb-tools { opacity: 1; transform: translateY(0); }
.tool-btn { width: 32px; height: 32px; border-radius: 9px; border: none; cursor: pointer; display: grid; place-items: center; color: #fff; background: rgba(20,20,30,.62); backdrop-filter: blur(6px); transition: transform .15s, background .2s; }
.tool-btn:hover { transform: scale(1.12); }
.edit-btn:hover { background: var(--accent); }
.del-btn:hover { background: var(--accent-3); }

.select-check { position: absolute; top: 8px; left: 8px; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; color: #fff; background: rgba(20,20,30,.45); border: 2px solid rgba(255,255,255,.7); opacity: 0; transform: scale(.6); transition: all .2s; }
.file-card:hover .select-check { opacity: .8; }
.file-card.selected .select-check { opacity: 1; transform: scale(1); background: var(--accent); border-color: var(--accent); }
.file-card.selected { outline: 2.5px solid var(--accent); outline-offset: 1px; box-shadow: 0 12px 28px -14px var(--accent); }

.edited-badge { position: absolute; bottom: 8px; left: 8px; font-size: .68rem; font-weight: 700; color: #fff; background: var(--accent-2); padding: 3px 9px; border-radius: 999px; }

/* selection bar */
.selection-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 10px 14px; margin-bottom: 16px; border-radius: 14px; background: color-mix(in srgb, var(--accent) 10%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); animation: fade .3s ease both; }
.sel-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-ghost.mini { padding: 7px 13px; font-size: .82rem; border-radius: 10px; }
.btn-ghost.mini.danger:hover { color: var(--accent-3); border-color: var(--accent-3); }

/* ===== Modal / Editor ===== */
.modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: 16px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(8,8,14,.6); backdrop-filter: blur(6px); opacity: 0; transition: opacity .25s; }
.modal.shown .modal-backdrop { opacity: 1; }
.modal-card { position: relative; width: min(620px, 100%); max-height: 92vh; overflow: auto; background: var(--surface-solid); border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow); padding: 22px; opacity: 0; transform: translateY(16px) scale(.97); transition: opacity .3s, transform .3s cubic-bezier(.2,.9,.3,1.2); }
.modal.shown .modal-card { opacity: 1; transform: translateY(0) scale(1); }
.modal-head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.modal-head h3 { font-size: 1.2rem; font-weight: 700; }
.modal-sub { font-size: .82rem; color: var(--text-faint); flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.modal-close { width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--border); background: transparent; color: var(--text-soft); cursor: pointer; display: grid; place-items: center; transition: all .2s; }
.modal-close:hover { color: var(--accent-3); border-color: var(--accent-3); }

.editor-stage { position: relative; display: grid; place-items: center; padding: 12px; border-radius: 16px; background: repeating-conic-gradient(color-mix(in srgb,var(--text) 7%,transparent) 0% 25%, transparent 0% 50%) 50% / 22px 22px; min-height: 200px; }
#editorCanvas { border-radius: 8px; box-shadow: 0 8px 30px -10px rgba(0,0,0,.5); cursor: grab; touch-action: none; display: block; }
.editor-grid { position: absolute; pointer-events: none; inset: 0; display: none; }

.editor-tools { display: flex; align-items: flex-end; gap: 18px; flex-wrap: wrap; margin: 18px 2px 6px; }
.tool-group { display: flex; align-items: center; gap: 8px; }
.tool-group.grow { flex: 1; min-width: 160px; }
.tool-group.grow .range { flex: 1; }
.tool-label { font-size: .76rem; font-weight: 600; color: var(--text-soft); margin-right: 2px; }
.ed-btn { width: 40px; height: 40px; border-radius: 11px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; display: grid; place-items: center; transition: all .18s; }
.ed-btn:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }
.ed-btn:active { transform: scale(.92); }
.text-input.select.mini { padding: 8px 10px; font-size: .85rem; width: auto; }

.modal-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }
.foot-right { display: flex; gap: 10px; }

/* ===== Footer ===== */
.footer { text-align: center; padding: 30px 20px 50px; color: var(--text-faint); font-size: .85rem; }

/* ===== Toast ===== */
.toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(120px); background: var(--surface-solid); border: 1px solid var(--border); color: var(--text); padding: 13px 22px; border-radius: 14px; box-shadow: var(--shadow); font-weight: 600; font-size: .9rem; z-index: 100; transition: transform .4s cubic-bezier(.2,.9,.3,1.3); }
.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== utils / keyframes ===== */
.hidden { display: none !important; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } }
@keyframes pop { from { opacity: 0; transform: scale(.5); } }

@media (max-width: 560px) {
  .opts-row { flex-direction: column; gap: 16px; }
  .hero { padding-top: 12px; }
}